3 years ago

HELP ASAP !!!!!!!!!!! I need help with number 10

Mathematics

1 answer:

pickupchik [31]3 years ago

3 0

Answer:

Step-by-step explanation:

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Charles is going to buy 3 computer tables for 390$. If he pays the same rate, how much would it cost for 8 computer tables?

Dafna1 [17]

390 divided by 3= $130.
So 130 x 8 = $1040

7 0

4 years ago

My work is already late because I was suppose to turn it in at 9:30 PM sooo like help?

CaHeK987 [17]

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3 years ago

Use the given figure to find the length of x.

lubasha [3.4K]

Answer:

x = 18

Step-by-step explanation:

This problem can be solved using concept of Pythagoras theorem.

Pythagoras theorem states that in a right angled triangle, if "a" and "b" are sides containing the right angle and h is hypotenuse then the relation between them is $a^2 + b^2 = h^2$

_________________________________________

Given in the problem

a = 24

b = x

h = x+12

applying Pythagoras theorem

$24^2 + x^2 = (x+12)^2\\=> 576 + x^2 = x^2 + 24x + 144\\=>576 = x^2 + 24x + 144 - x^2\\=> 576 = 24x + 144 \\=> 576 - 144= 24x\\=> 432 = 24x\\=> x = 432/24 = 18$

for (x+12)^2 we have used formula $(a+b)^2 = a^2 + 2ab + b^2$

Thus, value of x is 18.

8 0

4 years ago

If two supplementary angles are 3 x space plus space 7 and 2 x minus 1, what is the value for x?

ICE Princess25 [194]

Answer:

3x + 7 + 2x -1

Step-by-step explanation:

(3x+2x)+(7-1)

5x + 6

6 / 5

x=1.2 or 2/10

7 0

3 years ago

Will has 2 quarters, 6 dimes, some nickels, and 4 pennies. If the ratio of pennies to the total number of coins he has is 1:5, h

Mamont248 [21]

Answer:

8 nickels

Step-by-step explanation:

Let n be the number of nickels.

4: (2+ 6 + 4 + n) = 1:5

4÷(12 + n) = 1÷5

4 x 5 = 1 x (12 + n)

20 = 12 + n

n = 8

4 0

3 years ago